参考答案

参考范文：
    The past years have witnessed a mounting number of Chinese scholars returning from overseas. As is lively illustrated by the column chart, the number of returnees climbed from a mere 69.3 thousand in 2008 to over 272.9 thousand in 2012, at an annual increase rate of around 50%.
    A multitude of factors may have led to the tendency revealed by the chart, but the following are the critical ones from my perspective. First and foremost, along with the development of Chinese economy and society, the number of Chinese studying abroad has been soaring in the past years, which has provided an expanding base for the number of returnees. In the second place, the government has enacted a series of preferential policies to attract overseas Chinese scholars back home. Last but not least, the booming economy, science and technology in this country have generated more job opportunities for scholars returning from overseas.
    The waves of returnees will definitely contribute to this nation’s development, since they have brought back not only advanced science and technology but also pioneering concepts of education and management. With more scholars coming back from overseas, and with the concerted efforts of the whole nation, we have reasons to expect a faster rejuvenation of this country.